Lucerne Weather in September
In Lucerne, September brings pleasant daytime temperatures around 19°C (66°F), with nights cooling to 10°C (50°F). Expect quite a bit of rainfall this month.
Rainfall in Lucerne in September
On average, there are about 13 days with rain during this month, averaging 168 mm (6.6 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Lucerne in September
Daytime highs in Lucerne in September reach 19°C (66°F), with nights around 10°C (50°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. At 10°C (50°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Lucerne in September
You can expect a moderate amount of sunlight, with approximately 138 hours. This means a pleasant mix of sun and overcast.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our Lucerne's climate page.
Lucerne Temperature in September
Min Temperature
10°C (50°F)
Max Temperature
19°C (66°F)
Chance of Rain
45%
Precipitation
168 mm (6.6 in)
Rainy days
13 days
Humidity
78% *
Sunshine
138 hours *
Percentage Sunshine
52% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Lucerne typically drop from around 20°C (68°F) at the start of September to approximately 17°C (63°F) by the end. Nights are cool, with lows typically ranging from 8°C (46°F) to 11°C (52°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Lucerne in September
Browse day-by-day weather records for Lucerne spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Lucerne historical weather extremes in September
According to our 49 years of weather records for Lucerne, the following extremes were recorded between 1976 and 2025.
- Lucerne recorded its highest September temperature of 31°C (88°F) on September 1, 1981.
- On September 25, 2002, Lucerne saw its coldest September day with temperatures maxing out at 6°C (43°F).
- Nighttime temperatures dropped to -5°C (23°F) on September 22, 1977, marking the coldest September night on record.
Best Places in Switzerland in September
Find out more about the weather in Switzerland and which places have the best travel conditions in this month. See all of Switzerland in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Lucerne in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Lucerne in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our Lucerne's climate page.
Temperature Rainfall Sunshine Humidity
See the full Lucerne climate overview or explore weather in Switzerland.
